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Time difference between Seattle and Boston

Boston is 3 hours ahead of Seattle.

Seattle
United States · Pacific Daylight Time
12:41 AM
Wednesday, October 21, 2026
Boston
United States · Eastern Daylight Time
3:41 AM
Wednesday, October 21, 2026
Compare more placesBoston to Seattle

Seattle to Boston time converter

Green rows are office hours in both places; light green rows are when both are awake.

SeattleBoston
12:00 AM3:00 AM
1:00 AM4:00 AM
2:00 AM5:00 AM
3:00 AM6:00 AM
4:00 AM7:00 AM
5:00 AM8:00 AM
6:00 AM9:00 AM
7:00 AM10:00 AM
8:00 AM11:00 AM
9:00 AM12:00 PM
10:00 AM1:00 PM
11:00 AM2:00 PM
12:00 PM3:00 PM
1:00 PM4:00 PM
2:00 PM5:00 PM
3:00 PM6:00 PM
4:00 PM7:00 PM
5:00 PM8:00 PM
6:00 PM9:00 PM
7:00 PM10:00 PM
8:00 PM11:00 PM
9:00 PM12:00 AM (next day)
10:00 PM1:00 AM (next day)
11:00 PM2:00 AM (next day)

Questions

What is the time difference between Seattle and Boston?

Boston is 3 hours ahead of Seattle. Seattle is on UTC−7 and Boston is on UTC−4.

What time is it in Boston when it is 9 AM in Seattle?

When it is 9:00 AM in Seattle, it is 12:00 PM in Boston.

When is the best time to call Boston from Seattle?

The best time to call or meet is 9:00 AM–3:00 PM in Seattle (12:00 PM–6:00 PM in Boston), when both places are in normal office hours.

Does the time difference between Seattle and Boston change?

Yes. Because of daylight saving time, the difference changes on Saturday, October 31, 2026, when Boston will be 2 hours ahead of Seattle.

Seattle is 3 hours behind Boston. More: time in Seattle · time in Boston

Time difference from Seattle to other cities

All Seattle time differences →

Time difference from Boston